Electrochimica Acta最新文献

筛选
英文 中文
Photocurrent switching effect and visible light activity of electrochemically synthesized bifunctional through oxide via TiO2/CuO composites
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-04 DOI: 10.1016/j.electacta.2024.145483
Ramūnas Levinas, Vidas Pakštas, Gediminas Niaura, Roman Viter, Vitalija Jasulaitienė, Loreta Tamašauskaitė-Tamašiūnaitė, Eugenijus Norkus
{"title":"Photocurrent switching effect and visible light activity of electrochemically synthesized bifunctional through oxide via TiO2/CuO composites","authors":"Ramūnas Levinas, Vidas Pakštas, Gediminas Niaura, Roman Viter, Vitalija Jasulaitienė, Loreta Tamašauskaitė-Tamašiūnaitė, Eugenijus Norkus","doi":"10.1016/j.electacta.2024.145483","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145483","url":null,"abstract":"Photoelectrochemical conversion of solar energy into fuel products such as H<sub>2</sub> or CH<sub>4</sub> is an appealing, but technologically difficult process due to the simultaneous requirements for stability, efficiency and selectivity in the photoelectrode. One approach to design a photoelectrode with suitable properties is by using different materials that can complement each other. In this study, we introduce a novel approach by compositing TiO<sub>2</sub> with CuO via electrodeposition of Cu into through-oxide vias/channels – a design that offers enhanced synergy between the materials. The Cu is then precisely transformed into Cu<sub>2</sub>O, CuO, or a mixture, based on annealing temperature, enabling tunable properties and optimized functionality. Unlike in traditional “sandwich” composites, this structuring reduces bulk charge carrier recombination through the formation of a depletion zone between TiO<sub>2</sub> and CuO, allowing both materials to perform distinct functions. As a result, photocurrent switching is achieved by altering the applied potential, which is a functionality not previously demonstrated for photoactive composite materials. Our study also reports evidence of visible light sensitivity in TiO<sub>2</sub>/CuO composites when illuminated by a 4100K LED without UV components. Open circuit voltage decay measurements reveal that the improved charge carrier transport is due to the formation of a conductive Cu pathway—a novel finding that opens new possibilities for efficient photoexcitation. Although the charge carrier lifetimes were found to be shorter in TiO<sub>2</sub>/CuO electrodes compared to pure TiO<sub>2</sub>, we attribute this to the phenomenon of Cu \"filling\" the TiO<sub>2</sub> channels and decreasing the available surface area, a trade-off that provides crucial insights into material design for future applications.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"46 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142776730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-supporting carbon-encapsulated TiNb2O7 electrode as anode for improved Li-ion batteries: experimental and theoretical studies
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-03 DOI: 10.1016/j.electacta.2024.145478
Prerna Chaturvedi, Zeyad M. Abdulhamid, Inas Taha, Dalaver H. Anjum, Samuel Mao, Daniel Choi
{"title":"Self-supporting carbon-encapsulated TiNb2O7 electrode as anode for improved Li-ion batteries: experimental and theoretical studies","authors":"Prerna Chaturvedi, Zeyad M. Abdulhamid, Inas Taha, Dalaver H. Anjum, Samuel Mao, Daniel Choi","doi":"10.1016/j.electacta.2024.145478","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145478","url":null,"abstract":"Titanium Niobate (TiNb2O7, TN), exhibiting the Wadsley-Roth phase, is regarded as a promising candidate for lithium-ion batteries (LIBs) due to its substantial theoretical capacity and safe operating potential. However, its commercial application is impeded by poor electronic conductivity and slow ionic diffusion kinetics. In this study, carbon-encapsulated TiNb2O7 particles (TN-C) were investigated as viable anodes for LIBs. In contrast to the conventional binder-based electrode fabrication method, the anode is produced using a 'binder-free' technique, yielding a 'self-supporting' flexible electrode suitable for diverse applications. A thorough electrochemical evaluation shows that TN-C self-supported composite electrode exhibits improved reaction kinetics and enhanced specific capacities, reaching 334 mA h/g at 0.1 C. Additionally, it demonstrates improved rate capabilities, and long-term cyclic performance by retaining ∼82% of its capacity and maintaining nearly 100% Coulombic efficiency even after 2000 cycles at 10 C. Moreover, the role of carbon encapsulation has been thoroughly examined via experimental studies and vigorously supported by theoretical calculations using density functional theory (DFT). Additionally, a full-cell LIB is configured using TN-C and LiFePO4 composite electrodes as anode and cathode, respectively. The full cell shows excellent electrochemical performance, high capacity, and promising potential for practical applications. The full-cell battery maintains around 79% of its capacity and attains 98% Coulombic efficiency after 500 cycles. Additionally, it exhibits a high energy density of 255 W h/kg and a substantial power density of 1,409 W/kg. These findings unequivocally indicate that the TN-C composite material is a highly promising anode candidate for safe, high-capacity, and stable flexible LIBs.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"12 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced Vitamin B12 Detection Using a CxNixOyFeyOx+3 Bimetal-Organic Framework: A Comprehensive Electrochemical Study
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-03 DOI: 10.1016/j.electacta.2024.145476
Sivalingam Gopi, Annadurai Thamilselvan, Moon Il Kim, Kyusik Yun
{"title":"Enhanced Vitamin B12 Detection Using a CxNixOyFeyOx+3 Bimetal-Organic Framework: A Comprehensive Electrochemical Study","authors":"Sivalingam Gopi, Annadurai Thamilselvan, Moon Il Kim, Kyusik Yun","doi":"10.1016/j.electacta.2024.145476","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145476","url":null,"abstract":"The functions of neurons and blood cells are aided by vitamin B<sub>12</sub>. Serum vitamin B<sub>12</sub> levels are picomolar, and their deficiencies may be remedied using vitamin B<sub>12</sub> tablets. Consequently, sensitive and selective vitamin B<sub>12</sub> detectors that can be used at the point-of-care for food, pharmaceutical, and biological samples are urgently needed. In this study, we present the synthesis and carbonization of a Ni- and Fe-based bimetallic organic framework for the electrochemical sensing of vitamin B<sub>12</sub>. The crystalline nature and functional groups of the material were analyzed using X-ray diffraction and Fourier transform infrared (FT-IR) spectroscopy, and the oxidation states within the framework were determined using X-ray photoelectron analysis. Field-emission scanning electron microscopy revealed a uniform spherical morphology with particle sizes ranging from 2 to 10 nm. Electrochemical analysis was performed to detect vitamin B<sub>12</sub> by cyclic voltammetry (CV) on a screen-printed carbon electrode modified with C<sub>x</sub>Ni<sub>x</sub>O<sub>y</sub>Fe<sub>y</sub>O<sub>x+3</sub>. CV analysis revealed that the fabricated electrode exhibits excellent redox peaks at approximately 0.0245 and -0.514 V with a low detection limit of 49 nM for vitamin B<sub>12</sub> and a wide linear detection range up to 200 µM. Interference studies confirmed the selectivity of the sensor with minimal impact from common biomolecules and inorganic ions. The sensor demonstrated excellent repeatability (RDS = 3.5%), reproducibility, and long-term stability, retaining 94% of its initial current response for over 20 d. The real sample analysis of commercial vitamin B complex tablets demonstrated a recovery rate of 98.59%, highlighting the practical applicability of the sensor in pharmaceutical analysis.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"82 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of square-wave AC electrophoretic deposition of lithium titanate anodes for Li-ion batteries
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-03 DOI: 10.1016/j.electacta.2024.145469
Elazar Cohen, David Stark, Olga Kondrova-Guchok, Pini Shekhter, Diana Golodnitsky
{"title":"Study of square-wave AC electrophoretic deposition of lithium titanate anodes for Li-ion batteries","authors":"Elazar Cohen, David Stark, Olga Kondrova-Guchok, Pini Shekhter, Diana Golodnitsky","doi":"10.1016/j.electacta.2024.145469","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145469","url":null,"abstract":"Electrophoretic deposition (EPD), while being a scientifically interesting technique due to its inherent versatility, has only limited success in industrial applications. This is partly due to the need to employ expensive and potentially hazardous organic solvents in traditional suspensions. Recently, a significant effort has been focused on the use of aqueous systems and AC-EPD approaches. In this article we present a study and characterization of square-wave electrophoretic deposition at different frequencies of the lithium titanate water-based suspension for application in lithium-ion batteries. We have found that the mass of the deposit linearly increases with time. This reveals that depletion zones are less prone to form in an alternating field, hence enabling formation of homogeneous films and diminishing a growth in bath resistance as compared to DC mode. The EPD performed at critical frequency of 40kHz results in higher content of carbon co-deposited with LTO, improved capacity and power capability and of Li/LTO cells.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"86 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Three-dimensional nanoflower-like transition metal sulfide heterostructures (Co9S8/Co1-xS /WS2) as efficient bifunctional oxygen electrocatalysts for Zn-air batteries
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-03 DOI: 10.1016/j.electacta.2024.145467
Boxin Fan, Anmin Lei, Yueping Zou, Miaomiao Liu, Lianhua Zhao, Biyao Jin
{"title":"Three-dimensional nanoflower-like transition metal sulfide heterostructures (Co9S8/Co1-xS /WS2) as efficient bifunctional oxygen electrocatalysts for Zn-air batteries","authors":"Boxin Fan, Anmin Lei, Yueping Zou, Miaomiao Liu, Lianhua Zhao, Biyao Jin","doi":"10.1016/j.electacta.2024.145467","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145467","url":null,"abstract":"The charging and discharging processes of rechargeable Zn-air batteries (ZABs) require the use of precious metal catalysts (Pt and RuO<sub>2</sub>) that are expensive. Therefore, preparing efficient, stable, and affordable metal bifunctional oxygen electrocatalysts compatible with both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial. Herein, a nanoflower-like Co<sub>9</sub>S<sub>8</sub>/Co<sub>1-x</sub>S/WS<sub>2</sub> bifunctional oxygen electrocatalyst with a layered structure has been prepared. The cobalt sulfide serves as the main active site and the synergistic interaction between the multi-components modulates the electronic structure of the active site and generates abundant S vacancies, thereby effectively improving the bifunctional oxygen electrocatalytic performance. The electrocatalytic activity of the prepared catalyst for ORR/OER is close to that of commercial noble metal catalysts. When Co<sub>9</sub>S<sub>8</sub>/Co<sub>1-x</sub>S/WS<sub>2</sub> is used as the cathode material in Zn-air batteries, the batteries exhibit high specific capacity (822.6 mAh g<sub>Zn</sub><sup>−1</sup>), excellent energy density (958.9 Wh kg<sub>Zn</sub><sup>−1</sup>), as well as a battery charge/discharge cycling time that was twice that of the commercial catalyst PtC+RuO<sub>2</sub>.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"13 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Textile-Washing Wastewater Treatment using Ozonolysis, Electro-coagulation, and Electro-oxidation.
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-03 DOI: 10.1016/j.electacta.2024.145473
M.J. Yáñez-Ángeles, V.J. González-Nava, J.A. Castro-Fernández, R. García-Estrada, F. Espejel-Ayala, Y. Reyes-Vidal, F.F. Rivera-Iturbe, J. Cárdenas, E. Bustos
{"title":"Textile-Washing Wastewater Treatment using Ozonolysis, Electro-coagulation, and Electro-oxidation.","authors":"M.J. Yáñez-Ángeles, V.J. González-Nava, J.A. Castro-Fernández, R. García-Estrada, F. Espejel-Ayala, Y. Reyes-Vidal, F.F. Rivera-Iturbe, J. Cárdenas, E. Bustos","doi":"10.1016/j.electacta.2024.145473","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145473","url":null,"abstract":"The textile industry is one of the largest water consumers, with an annual usage of 79 billion cubic meters, and it is also one of the primary sources of contaminated wastewater due to its diverse production processes. Textile effluents contain recalcitrant contaminants such as dyes, toxic substances, inhibitors, surfactants, detergents, chlorinated compounds, and salts. The treatment and monitoring of these effluents are essential yet challenging due to the stable and diverse structure of the contaminants present. This study presents the results of textile-washing wastewater treatment using ozonolysis, electrocoagulation, and electro-oxidation at a laboratory scale, achieving significant reductions in physicochemical parameters: COD = 54.74 %, TOC = 74.48 %, TSS = 96.83 %, with a neutral pH of 7.71. These results comply with the criteria established by NOM-001-SEMARNAT-2021, which regulates wastewater discharges into surface water bodies in Mexico. Additionally, a relationship is established between the Food and Agriculture Organization of the United Nations / World Health Organization (FAO/WHO) standards for irrigation water, the European Union - Water Framework Directive (EU-WFD), and the Iranian standard for agricultural reuse in Iran, which aims to ensure good chemical and ecological status of water bodies through strict limits on organic and inorganic pollutants. The results allow compliance with the limits set by NOM-001-SEMARNAT-2021 and reflect global efforts to improve water quality, as promoted by the FAO/WHO, EU-WFD, and Iranian standards. Finally, based on experimental conditions, a GPS-X model of the coupled wastewater treatment system is proposed as an additional tool to optimize textile wastewater treatment and ensure compliance with international regulations.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"18 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Solutal Marangoni effect influencing bubble dynamics with varied electrolyte compositions
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-02 DOI: 10.1016/j.electacta.2024.145448
Mengsha Wang, Qiang Xu, Jinfeng Li, Tengfei Nie, Yonglu She, Liejin Guo
{"title":"Solutal Marangoni effect influencing bubble dynamics with varied electrolyte compositions","authors":"Mengsha Wang, Qiang Xu, Jinfeng Li, Tengfei Nie, Yonglu She, Liejin Guo","doi":"10.1016/j.electacta.2024.145448","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145448","url":null,"abstract":"In the photoelectrochemical (PEC) water splitting system, the intricate interplay between bubble evolution and charge transfer at the electrode-electrolyte interface underscores the paramount importance of studying electrolyte properties. In this paper, the bubble dynamics and gas-liquid interface mass transfer on TiO<sub>2</sub> nanorod and nanotube film electrodes are investigated by changing the cation types (K<sup>+</sup>, Na<sup>+</sup>, Li<sup>+</sup>) and concentrations (0.1 M-1.5 M) in alkaline electrolytes. The results indicate that the photocurrent and gas production follow the order of K<sup>+</sup> &gt; Na<sup>+</sup> &gt; Li<sup>+</sup> under the same concentration, which is affected by the solvation of metal cations in aqueous solution and the adsorption on the photoanode surface. Compared with the nanotube electrode, the nanorod electrode enables the bubble to detach at a smaller size and faster rate. The trend of bubble detachment diameter variation with concentration in different cation electrolytes is the same, and follows the order of K<sup>+</sup> &gt; Na<sup>+</sup> &gt; Li<sup>+</sup>, which indicates that the force caused by Marangoni effect shows similar rules. The results reveal that the surface tension variation rate induced by ion concentration gradient varies significantly under different cation concentrations, while the variation rate driven by temperature gradient remains notably stable. This confirms that the bubble growth and detachment depend on the solutal Marangoni effect caused by the surface tension variation rate of different alkaline electrolytes with concentration. Therefore, the suitable choice of electrolyte composition is pivotal for regulating the bubble evolution at the electrode-electrolyte interface and improving the PEC system efficiency.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"26 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Power and High-Energy Zinc Ion Cathodes through embedded CNTs current collectors in Vanadium Oxide
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-02 DOI: 10.1016/j.electacta.2024.145453
Carolina Ramos Capón, Juan J. Vilatela, Afshin Pendashteh
{"title":"High-Power and High-Energy Zinc Ion Cathodes through embedded CNTs current collectors in Vanadium Oxide","authors":"Carolina Ramos Capón, Juan J. Vilatela, Afshin Pendashteh","doi":"10.1016/j.electacta.2024.145453","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145453","url":null,"abstract":"Aqueous rechargeable zinc-ion batteries (ZIBs) represent a promising technology for increased adoption in various applications, especially for stationary energy storage purposes. Despite notable advancements in enhancing the capacity of electrode materials for ZIBs, the development of cathodes exhibiting high capacity at the electrode level, with application-relevant mass loadings and prolonged stability, remains challenging. Herein, we introduce composite electrodes consisting of vanadium oxide with an embedded conducting network of carbon nanotubes, reaching 96 wt.% of active material in the full electrode by eliminating binders and metallic foil. Embedding the CNT network results in flexible electrodes with a uniform distribution of active material, electrical conductivity of 3.5×10<sup>3</sup> S/m (e.g., 0.25 S/m out-of-plane) and high toughness. The resulting composite electrodes demonstrated a high capacity of 350 mAh/g at the electrode level, coupled with prolonged cycling performance both at low (e.g., 98% retention over 240 at 0.1 A/g) and high current densities (e.g., 87% over 1500 cycles at 5 A/g). The embedded conducting network within the electrode produces excellent high-rate properties up to 10 A/g (e.g., ∼170 mAh/g) due to the uniform distribution of active material and high internal electrical conductivity. Embedded CNT electrodes translate into a specific energy density of ∼ 290 Wh/kg at the electrode level, which is a 425% increase compared to conventional ZIB cells with titanium or stainless-steel current collectors.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"37 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unveiling the Practical Impact of Cyclic Additive- Ethyl-4-Toluene Sulfonate on Stable Interface and Extended Lifespan Using A Combination of Theory and Experiments in Full Cell LIBs
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-02 DOI: 10.1016/j.electacta.2024.145452
Farshad Boorboor Ajdari, Fereshteh Abbasi, Ganesh Kamath, Abolfazl Fathollahi Zonouz, Mehdi Shakourian- Fard, Sajad Zargan, Mahshid Ershadi
{"title":"Unveiling the Practical Impact of Cyclic Additive- Ethyl-4-Toluene Sulfonate on Stable Interface and Extended Lifespan Using A Combination of Theory and Experiments in Full Cell LIBs","authors":"Farshad Boorboor Ajdari, Fereshteh Abbasi, Ganesh Kamath, Abolfazl Fathollahi Zonouz, Mehdi Shakourian- Fard, Sajad Zargan, Mahshid Ershadi","doi":"10.1016/j.electacta.2024.145452","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145452","url":null,"abstract":"Additives play a pivotal role in enhancing lithium-ion battery performance, safety, and lifespan by mitigating electrolyte degradation, improving ion transport, and stabilizing the SEI layer to address issues of thermal instability and dendritic growth. This study evaluates Ethyl-4-toluene sulfonate (ETS) as a promising cyclic additive for improving lithium-ion battery efficiency and longevity. Through a combination of theoretical and experimental analyses, we assessed the stability and electrochemical properties of SEI layers with ETS integration.Our results show that ETS strongly interacts with electrode surfaces, fostering stable SEI formation and substantially reducing electrolyte oxidation. Highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy analyses indicate that ETS oxidizes prior to carbonate solvents, contributing to enhanced structural integrity. Adsorption energy calculations further reveal that ETS adheres to electrode surfaces more effectively than traditional electrolytes, reinforcing SEI stability.Experimental evaluations using FT-IR, XRD, and Rietveld refinement characterized electrode structure changes pre- and post-cycling. Testing electrolytes composed of ethylene carbonate (EC), dimethyl carbonate (DMC), and LiPF<sub>6</sub> with varied ETS concentrations, we found that the sample with 0.7% ETS exhibited optimal stability, achieving a high capacity of 1609.559 mAh.g⁻¹ over 400 cycles. SEM and impedance measurements confirmed substantial improvements in electrode structure and reduced resistance. The ETS-free electrolyte retained only 74.08% capacity after 400 cycles and failed after 610 cycles, whereas the 0.7% ETS sample maintained 90.55% capacity and lasted approximately 920 cycles. These findings underscore the potential of ETS to enhance SEI formation, prevent electrolyte degradation, and improve battery performance, positioning ETS as a valuable additive for advanced lithium-ion batteries.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"56 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of Internal Short-Circuit Risks in Overdischarged Lithium Batteries Under Various Charging Conditions
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2024-12-02 DOI: 10.1016/j.electacta.2024.145449
Ga-Eun Lee, Yu-Jeong Min, Heon-Cheol Shin
{"title":"Assessment of Internal Short-Circuit Risks in Overdischarged Lithium Batteries Under Various Charging Conditions","authors":"Ga-Eun Lee, Yu-Jeong Min, Heon-Cheol Shin","doi":"10.1016/j.electacta.2024.145449","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145449","url":null,"abstract":"This study analyzes the internal short-circuit behavior of an overdischarged secondary lithium-ion cell (OD-cell) under subsequent charging conditions. The results revealed that Cu ions dissolved from the anode Cu substrate during overdischarge were initially deposited on the cathode, migrated back to the anode, and deposited there during subsequent charging. These Cu deposits on the anode maintained their shape throughout normal charge–discharge cycles. Post-charging destructive analysis of the OD-cells revealed that the morphology of the Cu deposits on the anode surface varied significantly with the charging current. Cu formed coarse spherical particles at low currents (&lt; 0.2 C-rate). As the current increased, a mixture of spherical and dendritic structures appeared. Only dendritic structures were observed above a certain threshold (&gt; 3 C-rate). The leakage currents in OD-cells charged at various rates were measured to calculate their internal short-circuit resistance (ISR), and the relationship between Cu morphology and self-discharge was investigated. The “ISR decrease rate” was defined to compare the calculated ISR with the ISR of a normal cell, which was used as an indicator of the internal short circuit of the cell. The OD-cells charged at low currents (&lt; 0.2 C-rate) maintained an ISR similar to that of normal cells (ISR decrease rate &lt; 10%) with minimal self-discharge. However, high-current charging (&gt; 3 C-rate) significantly reduced the ISR (decrease rate of &gt; 97%) and introduced severe self-discharge. These findings suggest that high-rate charging immediately after overdischarge may exacerbate the internal short circuit and self-discharge owing to Cu-bridge formation.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"261 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142760816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信